114 

 part regular and not foliaceous in texture. 



GENUS. LIMA. 



Longitudinal, subequivalve, auriculated, slightly gap- 

 ing on one side ; beaks divaricated / hinge toothless 

 the cardinal pit partly external and receiving the 



L. BULLATA. Turt. B. t. 17. /. 4,5. PECTEN 

 FRAGILIS. Mont . Sup. p. 62. Pen. 4. p. 223. 

 OSTREA F. Turt.D. p. 131. LIMA F. F. p. 388 



Very convex and much curved outwards on one side with 

 numerous raised longitudinal striae, which are a little 

 undulated, with three or four lesser ones between each of 

 them ; cardinal margin and auricles oblique, i . . . 1 . 

 Devonshire and Bray in Ireland, rare. 



L. SUBAURICULATA. Turt. B. p. 218. F. p. 389. 

 PECTEN S. Mont. Sup. p, 63. t. 29. f. 2. OSTREA. 

 S. Turt. D. p. 131. Flattish and subequilateral, a 

 little unequal at one of the sides (but not so much as in 

 the last) with longitudinal straight striae without lesser 

 intermediate ones; auricles nearly rectilinear. ...&. 

 W. Coasts. More elongated than the last, the strife 

 more remote and nearly straight. 



GENUS. PECTEN. 

 Free, regular, inequivalve, auriculated, dorsal line 



